You may have heard that toric lenses are contact lenses for astigmatism, but what are they and why do they help? We walk through how to put on contacts and how they work as well as what to consider if you think you need them.
To determine what type of lens you need, visit your eye doctor. He or she will direct you to the lenses that can help you see the best. Colors and Effects. Not all contact lenses are clear. Some come with colors, either to help you locate your lenses more easily or to provide an effect. Colored lenses can help enhance or transform the color of.
Stock brands average from 8 diopters (written as +8.00 for farsighted prescriptions) to 12 diopters (written as -12.00 for nearsighted prescriptions). Different contact lens companies make lenses in various strengths. Your doctor can determine which lens is best for your eyes and whether custom lenses can be prescribed in a higher strength. By law, your prescriptions are only valid for one year or the minimum length of time required by state law, whichever is greater. Most states mandate that contact lens prescriptions expire after one year. When your prescription expires, you will not be able to buy any more contact lenses until your eye care practitioner updates your prescription. Cardhop 1.3.5 Cracked DMG for Mac OS Free Download Latest October 12, 2020, Thomas, No Comment. Cardhop 1.3.5 Cracked DMG for Mac OS Latest Version Download 2020 Cardhop 1.3.5 Cracked until recently, managing and interacting with your contacts was downright frustrating. Cardhop’s magic analytics engine is very intuitive and allows you.
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What are toric contact lenses?
A toric lens is a contact lens that's shaped in a particular way. Standard contact lenses have a spherical surface: think of a slice of the side of a beach ball.
Sqlpro studio 1 0 154 – powerful database manager database. A torus, in contrast, is a geometric shape that looks like a donut. A toric lens is shaped like a slice of the side of this donut.
The shape of toric contact lenses creates different refractive, or focusing, powers on the vertical and horizontal orientations. The refractive strength increases or decreases gradually as you move around the lens.
Contact lenses for astigmatism
Toric contact lenses correct for astigmatism issues that arise from a different curvature of the cornea or lens in your eye (referred to as regular astigmatism, corneal astigmatism or lenticular astigmatism).
In these cases, the cornea or lens is curved so that the refraction of your eye differs between the vertical and horizontal planes. This causes blurry vision and trouble seeing fine details. Sometimes, vertical lines will appear to tilt.
The ability for toric contact lenses to provide different refractive powers on the vertical and horizontal orientations addresses this specific peculiarity that causes astigmatism.
Choosing toric contact lenses
Toric contacts, like all contact lenses, need to be prescribed by your doctor, who can choose the lenses that are right for your vision, and fit them for your eyes. Talk to your eye doctor if you think you need contact lenses for astigmatism or other vision problems.
Meanwhile, here are some important things to consider:
Fitting is especially critical for toric contacts
Since toric contact lenses have a particular orientation, they need to stay on your eye in the correct way. Manufacturers design toric contact lenses with features to help the lenses stay put, including:
- Thin-thick zones
- Lens truncation, where the bottom of the lens is cut off a little
- Ballasting, where the lens is a little thicker or heavier
This means that fitting the contact lenses to your eyes is even more important than usual. Toric contact lenses have a middle axis, like the Earth’s equator, that keeps your line of vision clear. If your lenses don’t fit well and slip, so does the visual clarity.
Different types of toric contacts
Toric contact lenses also address other visual corrections, and come in every wear schedule. You can have toric dailies and other disposable toric contact lenses — you can even have colored toric contact lenses.
Toric contacts are also made with both soft and rigid gas permeable (RGP), or hard, lenses. RGP lenses can be better at staying put, but also involve a longer initial adjustment time and can be drier and more delicate. Soft toric contact lenses are more comfortable and easier to manage, but need extra care in fitting to stay in place.
As with all contact lenses, chat with your eye doctor about getting toric contact lenses for astigmatism. She can help you find the right correction and fit for both your eyes and your lifestyle.
Nothing in this article is to be construed as medical advice, nor is it intended to replace the recommendations of a medical professional. For specific questions, please see your eye care practitioner.
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